Casing-plug



R. C. BAKER.

CASING PLUG.

APPLICATION man s:PT.29,1919.

1,392,619, Patented oct. 4, 19.21.v

/f/ lll vA TTORNEYS UNITED STAJT Es PATENT OFFICE.

nnusnn c. Bunn, or commen, cnmromna, Assioma 'ro nanna einem@ SHOE comm, or commen, cnn-cama, A consonancia or emana-n CASINGMPIAUG.

To all-whom, t may concern:

vBe it known that I, REUBEN C. BA'KER, a citizen of the United States, residm at Coalinga, in the county of Fresno and tate of California, ful Improvement in Casing-Plugs, the following is a `s ecification. Y

This inventionA re ates to an appliance for well casings and particularly pertains to a -plug for the lower ends thereof. f

It often becomes necessary to vplug the lower ends of a well casing and permanently seal it to prevent an upward flow of liquid therethrough. It is the principal object of the present invention to rovide a mechanical plug which vma through the lower en of thereafter wedged into the casing, and thereby exclude water and other foreign matter from the lower end of the well casof which iugm s e present inventlon contemplates the use of a torpedo-shaped member carrying a packing gasket, sai member belng lowered into a well casingand mampulated so that the gasket will thoroughly pack around the body of vthe member and seal it,

the torpedo member being further provided with means for v 'water or other fluid therethrough while the lowering operation is taking place.

lThe 1nvention is illustrated by way of example in the accompanying drawings, 1n which- Figure 1 is a fragmentar view in vertical section and elevation, s owing the casin plug while being lowered into a well. l i 2 is a view in section elevation showing t e casing plug after it has been lowered to its extreme position and is ready to seal the well casing. f

Fig'. 3 is av view in vertical section 'and elevation showing the casing plugin its final permanent position.

Fig. 4 is aview in vertical section through Y the casing plug,'more clearly disclosing .its

construct1on. l Fig. 5 is a view through the body inem line 5-5 of Fig. 4. e y L Fig. G'is a fragmentary view melevation illustrating the manner in-which the gasket seals the lower end of the casing.` v lthe'drawings, 10 indicates a well caslin transverse section fer as seen on the "igfextending into a shaft 11. Thevlowerhave invented a new and use-V e easily lowered a well casing and easily ermitting circulation of Patented oet. 4, 1921.

.Application mea september Aas, 191s. ,semi m. senesi.

end `of this shaft is preferably filled with a mass of concrete 12 when it is desired to seal the end of the casing. This sealin operation is produced ,by the mass of pastic material 12 and a casing plug 13 with which the present. invention lis particularly conv cerned. l

The casing plug is formed with a body member 14 which has an inverted frustocomcal portion 15 at its lower end and a cylindrical portion 16 thereabove. The cylindrical portion is formed with an upper head 17, through which a threaded central opening 18 is formed and a plurality of by-pass openin s 19. A bushing 2O is mounted within t e threaded opening 18 and 1s alsosecured to a hemispherical cap 21. This cap is adaptedto lie flush upon the head 17 and has a plurality of outlet openin s 22 which will permit a circulat1on o fluid through the cap and the body member 14.

Securely held between the gap 21 and the body memberis a canvas packing gasket 23. This gasket is formed by a circular piece of canvas of such a dimension as to provide a wideel: marginal extension aspartlcularly shown in Fig. 4 of the drawings. By means of this annular extension upon the gasket, it is possible to form a satisfactory seal between the body member 14 of the plug and u most position and)'a terward set in its per- `marient position. The upper end of this rod is formedv with .an eye 25 to which a string-of tools orI other suspendin mem-l bers may I'be' secured. The lower en of the Arod is' permanently attached to a conical valve member 26. The outer contour of this member agrees with the outer surface of the body portion 15 and forms a complete tapered nose infcombinatio therewith. A spring 27 is mounted aroun the rod 24 and acts'between a collar28 upon the rod and a spider 29 passed across the lower mouth. of the body portion 15. lThis spring acts in vHowever, when the the base o the frusto-conical body portion 15 are not of the same diameter but the cylindrical ortion is somewhat reduced 1n diameter. v his is done so that clearance will'be provided for the gasket. 23 when 1t is folded downwardly and 'also a shoulder provided to wedge the gasket 1n posrtlon within the casing and to insure that a tight sealis produced.

In the operation of the present inventlon the .plug is assembled as is particularly shown in Fig. 1 and when not -1n use the gasket 23 will extend outwardly 1n a single lane as indicated b dotted lines 1n that gure. Whenthe p ug is to be used it 1s forced downwardly by therod 25.

cap 2,1 and wipe the side-walls of the casing while being moved in the dlrectlon of the arrow aas indicated inv-Fig. 1. The. 4downward force upon the rod 24 will overn 1s continued luntil the Abody portion an asket are com letely passed through the ower fiend of t e casing and forced vinto a body offplastic material, such as concrete which was poured down the casing before the entrance 'of the plug. After the gasket has cleared the lower end of the casing the of the arrow '-bas shown .in Fig: 2 and the `gasket turned .downwardly andi caused to' lie around thecylindrical 'portion 16 of the botlygasket, as more clearly .shown i'n Fig. As the body member is drawn 'upwardlythe gasket will pass around theQcy-A L lindrical'portion 16 and extend downwardly lili andoutwardl overl the 'shoulder 30., v The thickness of t e gasket and fthe din'ien'sions ofthe body member at thefshoulde'r are such that a wedging action will be' produced and l a-t-ight Seal made. The rod224 maythen be disconnected from/its fastenin: andthe concrete caused to flow lin aroun the lug and hold it in its wedged position. en

- pressure is released uponnthe rod 24 the the member 26 into a closed position so that spring 27 will, of course,l expand and draw theeliquid or fluid within the well `shaft will not pass upwardly into the casing.4 The Thisv will cause the gasket to fold back over the like flexible shoulder at the yand formed with 'on the top wall ofthe u the shoulder,

cap member 26 will be held in closed positionvwhen the concrete sets, asv will be understod. It will thus be seen that by use of the device here disclosed the well casing may be quickly and completely plugged, at the Same time wiping the casing clean of cement or Iother foreign material and sealin theV casing so that no such material or liquid or gas may flow into the casing after the cement has set.

It will be evident from the foregoing description that various changes might be made in the general construction and arrangements of parts without.l departing from the spirit of the present invention, as claimed.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. A casing plug having a body portion formed with'a frustoconical nose, a cylindrical base'of a reduced diameter forming 4a shoulder, a circular flexible packing gasket secured to overhang the base portion, means from which the structure depends, and a movable nose cap carried by said means.

.2: A plug for well casi-ngs 'including a body having a conical lower part and a cy- Y lindrical upper part the latter ofless diameter than the portion of greatestl diameter ofthe conical part and having a circular' shoulder at the base'of the lcylindrical part,.

a top,wall extending across the upper part and formed with a'central threaded aper- 100 ture and a series of by-pass openings, a bushing threaded in said aperture, a cupgasket seated at its end wall' on the top wall of the npperpart and formed to surround athe cylindrical part, a cap having a bottom seated on the end wall of the vgasket and threaded on the bushing, the ca bottom having o the by-pass openlngs oftlie body, said gasket plug may then be drawn .in the direction i penings which reglster wit body having a conical lower part and a c lindrical upper part, the latter of less' iameter than the portion of greatest diameter ofthe cdmcal. art and'^having a circular 120 ase ofthe cylindrical part,

a top wall extending across thev upper part by. pass-Openings, a cuplike flexible gasket` 'seatedv at its end wall seated on the end wall o the gasket and secured to thebody and,v having ,openings to register with ,the by-passv openin the gasket having its free edge engageab e over x loweringmeans, and means. 13.0

per part, a cap 12.15*v

to allowl circulation of Huid throughy the body uponl downmovement of the plug and to shut-.off circulation when the p ug .is in operative position.

4. A plug for well casings including a body having an upper reduced cylindrical part forming a shoulder, a asket on said part havin a skirt received '1n the reduced part and o a length to overhang the shoulder and to cause Haring of the skirt against the lower edge of the well casing, and lowering means for the plug.

5. Av plug for well casings includin a body, a gasket on the body having a s irt formed' to have its free edge lie 'between the body ends and to engage the bottom end edge of a well casing, and means to secure the gasket tothe body.

6. A plu for well casings including a body, a gas et on the body having a skirt secure the cap to the body, means-to lower the plug, and means to admitiluid circula tion Ithrough the openings during ldown movement of theparts and for preventing circulation when the plug is in -operative position.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. y

REUBEN C. BAKER.

Witnesses: O. D. CANADA, T. K. DAHLI, Jr. 

